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Tonight's 1News Colmar Brunton poll had the Greens polling at 7 per cent, which would make them the third largest party. Labour polled at 44 per cent - enough for a Labour-Greens coalition to govern on its own, without New Zealand First.

But Newshub's Reid Research poll on Tuesday had National on 47.3 per cent and the Green Party on 4.9 per cent - which would see National in power on its own and the Greens dropping out of Parliament completely.

The party does not have much in the way of internal polling but "actually from what I've seen we're doing alright", Shaw told Focus' Tristram Clayton.

He said it was now "entirely possible" that Labour and the Greens could govern without Winston Peters, and "that makes me very happy".

"We've always said we could work with him in a coalition but we don't want to be dependent on him because you just don't know what you're getting. Who is he going to go with, which of his various policies is he going to try and insist on?"

He was not concerned about reaching the 5 per cent threshold. "We are going to make that and, I mean, I have no real concerns about that."

His "primary obsession" for the next eight days was changing the Government.

Responding to a question about how the mood of the party had changed following co-leader Metiria Turei's resignation, Shaw said the party was running its strongest ground campaign ever.

In 2014's campaign the party made around 20,000 - 30,000 direct contacts with voters; this election they have already hit 130,000, he said.